Growing Ferns - Knowledgebase Question

Indianapolis, IN
Question by artistLn
November 18, 1997
I have been trying to grow ostrich ferns outside in a shaded spot for several years. Our soil is mostly clay but I have added the Aluminum Sulfate to get it more acidic for ferns. My problem is that the ferns either don't come up at all or they only grow to about 12 inches each year. What could the problem be?


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Answer from NGA
November 18, 1997

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Ferns naturally grow in humusy woodland soils, so heavy clay is a challenge for them. Try working in some compost, either from your own household pile or purchased from a garden center. Also, be careful with the aluminum sulfate. It is probably a good idea to test the soil before you amend it. You may have had perfect soil pH for ferns and now it may be too acidic. Contact your County Extension Office (ph# 317/253-0871) for information on how to test your soil. Hope this helps!

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